app/Server/Endpoints/TrackMessagesEndpoint.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Collections.Immutable;
-using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Net;
 using System.Text.Json;
@@ -9,7 +8,6 @@ using DHT.Server.Data;
 using DHT.Server.Data.Filters;
 using DHT.Server.Database;
 using DHT.Server.Service;
-using DHT.Utils.Collections;
 using DHT.Utils.Http;
 using Microsoft.AspNetCore.Http;
 
@@ -55,16 +53,12 @@ namespace DHT.Server.Endpoints {
 			Reactions = json.HasKey("reactions") ? ReadReactions(json.RequireArray("reactions", path + ".reactions"), path + ".reactions[]").ToImmutableArray() : ImmutableArray<Reaction>.Empty
 		};
 
-		[SuppressMessage("ReSharper", "ConvertToLambdaExpression")]
 		private static IEnumerable<Attachment> ReadAttachments(JsonElement.ArrayEnumerator array, string path) => array.Select(ele => new Attachment {
 			Id = ele.RequireSnowflake("id", path),
 			Name = ele.RequireString("name", path),
 			Type = ele.HasKey("type") ? ele.RequireString("type", path) : null,
 			Url = ele.RequireString("url", path),
 			Size = (ulong) ele.RequireLong("size", path)
-		}).DistinctByKeyStable(static attachment => {
-			// Some Discord messages have duplicate attachments with the same id for unknown reasons.
-			return attachment.Id;
 		});
 
 		private static IEnumerable<Embed> ReadEmbeds(JsonElement.ArrayEnumerator array, string path) => array.Select(ele => new Embed {

app/Utils/Collections/LinqExtensions.cs

@@ -1,18 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace DHT.Utils.Collections {
-	public static class LinqExtensions {
-		public static IEnumerable<TItem> DistinctByKeyStable<TItem, TKey>(this IEnumerable<TItem> collection, Func<TItem, TKey> getKeyFromItem) where TKey : IEquatable<TKey> {
-			HashSet<TKey>? seenKeys = null;
-			
-			foreach (var item in collection) {
-				seenKeys ??= new HashSet<TKey>();
-				
-				if (seenKeys.Add(getKeyFromItem(item))) {
-					yield return item;
-				}
-			}
-		}
-	}
-}

app/Version.cs

@@ -7,6 +7,6 @@ using DHT.Utils;
 
 namespace DHT.Utils {
 	static class Version {
-		public const string Tag = "35.2.0.0";
+		public const string Tag = "35.1.0.0";
 	}
 }